Safety lock for pins and the like



Jan. 29, '1929. 1,700,357

M. M. GRAHAM SAFETY LOOK FOR PINS AND THE LIKE Filed Feb. 15, 1928 4a- 7a ii r, 7 4a WW4 y/ I Q22 2/ 2.22

1* L; W W 7 27 A Inn/Zen 711.722 Gra m Patented Jan. 29, 1929.

* UNITED STATES MELVILLE M. GRAHAM, DE LOS ANGELES, CALIFORNIA.

SAFETY LOOK FOR; PINS AND THE LIKE.

Application filed February 15, 1928. Serial No. 254,431.

This invention relates to safety catches for preventing loss of badges,pins and the like, and has for an object the provision of an improvedtype of safety catch by means of e which dislodgment of the badge or pinwith which it is used, is practically made impossible after once havingbeen locked in position.

Another object is the provision of a catch as above described, which isadaptedto be in mounted upon and used in conjunction with the safetycatch already in extensive use.

A further object is the provision of a catch of the character described,which, while being positive in operation, is'of very simpleconstruction, resulting in low manufacturing cost and ease of operation.

With the foregoing and other objects in view which will be made manifestin the following detailed description and specifically pointed out inthe appended claims, ref erence is had to the accompanying drawings foran illustrative embodiment of the invention, wherein:

Figure 1 is a rear elevation of a badge having one of my improvedcatches Sl1OWI1 111 locked position thereupon in conjunction with one ofthe catches of the type which is already in very extensive use.

Fig. 2 is an enlarged, longitudinal, vertical,

sectional view of a portion of the badge of Fig. 1, and catches. Theplane of section is taken upon the line 2-2 of Fig. 1 in the directionof the arrows.

Fig. 3 is a transverse, sectional View of a :m portion of the badge ofFig. 1, showing the catches in end elevation. The direction of view isindicated by the arrow 3 of Fig. 1, and the catches are shown in lockedposition. Fig. i is a View similar to Fig. 3, with the catches shown inunlocked position.

while my improved catch is shown and described as being utilized inconjunction with a badge, I Wish it to be understood that I do not wishto be limited to such use, as the .1 catch is of equal value when usedupon pins, brooches, or in fact any article which may be secured to asupporting structure by a pin receivable within a seat after the articlehas been thus secured.

In its preferred embodiment, my improved catch is especially adapted tobe used in conjunction with a catch of the type already in veryextensive use. A badge 6 has a securing pin 7 pivoted to the backthereof through the expedient of a pivot pin 8 extending throughupstanding ears 9 and through one end of the pin 7. A seat 11 is alignedwith the'pivot pin 8, so that when the-pin 7 is bent down in substantialparallelism with the badge 6, the free end 12, which is preferablyprovided with a relatively sharp point, may be received Within the seat.

In order to prevent unseating of thefree end 12 from the seat 11, theseat 11 is constructed in the form of a trough within the walls of whicha locking cylinder 13 is mounted for rotary movement about an axisparallel to or coinciding with the longitudinal axis of the trough. Thecylinder 13 is provided with a radial slot 14: extending throughout thelength of the cylinder, this slot extending from the center of thecylinder to the circumference. tend outwards from the cylinder 13through a slot 17 extending circu-mferentially of the seat 1.1, so thatthe lugs 16 and cylinder 13 may be turned within the seat 11. Thus itmay be seen that the cylinder 13 may be turned by means of the lugs 16so that the slot 14 coincides with the space 18 between the walls of theseat 11. Then, after the end 12 of the pin 7 has been passed through thespace 18 to the slot 14;, the cylinder 13 may be turned back so thatescape of the end 12 from the seat 11. is prevented. This constructionis well known, and I lay no claim to the device thus far set forth.

My improved catch, designated as an entirety by the reference numeral21, comprises a piece of wire having a straight portion 22 mounted forrotary movement about its longitudinal axis within a hole 23 formed inthe seat 11, preferably in substantial parallelism with the pin 7 whenthe pin is seated. The outer end 24; of the wire is upset to preventdisplacement of the wire from the hole 23; and the other end 26 of thewire is bent into substantial parallelism with the inner side of theseat 11. The end of the portion 26 of the wire remote from the straightportion 22, is formed into a hook 27 preferably with radius of curvaturecoinciding with that of the pin 7. The hook portion 27 has its extremeend 28 bent back upon itself far enough so that the distance between theend 28 and the straight portion 22 is less than that between the outereurved portion 27 and the straight portion 22. Thus when the hook 27 issnapped over the pin 7, the end 28 engages the pin 7 and distorts thewire to permit the end 28 to pass over the pin 7. When this has beendone, the natural resiliency of the A pair oflugs 16 exwire I preventsdislodgment of the safety catch 21.

It may thus be seen that both when used by itself and when used inconjunction with the ordinary type of safety catch, my improved catchoffers positive means for preventing dislodgment of the badge after thepin 7 and catch 21 have been set in locked position.

Various changes in the details of construc tion may be made withoutdeparting from the spirit and scope of the invention as de fined by theappended claims.

I claim:

1. A look for a pivotally mounted pin, comprising a seat in registerwith a portion of said pin, a safety catch comprising a piece said pinfor the removable reception thereof, a safety catch comprising a pieceof resilient wire having a straight portion mounted for rotary movementadjacent said seat, one end of said wire being bent to provide a hookadapted to engage said pin when received within said seat, the radialdistance from the axis of rotation of said straight portion to the arctraversed by the end of the hook being less than the distance fromsaidaxis of rotation of the straight portion to the opposite side ofsaid pin when disposed within the seat.

3. A look for a pivotally mounted pin, comprising a seat in registerwith a portion of said pin for the removable reception thereof, a safetycatch comprising apiece of resilient wire having a straight portionmounted for rotary movement adjacent said seat, one end of said wirebeing bent to provide a hook adapted to engage said pin when receivedwithin said seat, and resilient means for retaining said hook inengagement with the pin.

In testimony whereof I have signed my name to this specification.

MELVILLE M. GRAHAM.

